Invention Grant
US08649353B2 Method and apparatus for accessing a random access channel by selectively using dedicated or contention-based preambles during handover
有权
用于通过在切换期间选择性地使用专用或基于争用的前导码来访问随机接入信道的方法和装置
- Patent Title: Method and apparatus for accessing a random access channel by selectively using dedicated or contention-based preambles during handover
- Patent Title (中): 用于通过在切换期间选择性地使用专用或基于争用的前导码来访问随机接入信道的方法和装置
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Application No.: US12392235Application Date: 2009-02-25
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Publication No.: US08649353B2Publication Date: 2014-02-11
- Inventor: Guodong Zhang , Jin Wang
- Applicant: Guodong Zhang , Jin Wang
- Applicant Address: US DE Wilmington
- Assignee: InterDigital Patent Holdings, Inc.
- Current Assignee: InterDigital Patent Holdings, Inc.
- Current Assignee Address: US DE Wilmington
- Agency: Volpe and Koenig, P.C.
- Main IPC: H04W4/00
- IPC: H04W4/00 ; H04J3/08 ; H04W36/00
Abstract:
A method and apparatus for accessing a random access channel (RACH) during handover are disclosed. A handover procedure is initiated and a maximum handover interruption timer is activated. A dedicated preamble is transmitted in an attempt to access the RACH on a condition that the dedicated preamble is reserved in a current random access opportunity and the maximum handover interruption timer has not expired. A contention-based preamble is transmitted in an attempt to access the RACH on a condition that a dedicated preamble is not reserved in a current random access opportunity. If the maximum handover interruption timer has expired, a contention-based preamble is transmitted in an attempt to access the RACH.
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